linux-kernel - Re: [PATCH] thermal: qcom: tsens-8916: mark PM functions __maybe

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Message-ID: <577B1D64.2020509@codeaurora.org>
Date:	Tue, 05 Jul 2016 08:07:24 +0530
From:	Rajendra Nayak <rnayak@...eaurora.org>
To:	Arnd Bergmann <arnd@...db.de>,
	Eduardo Valentin <edubezval@...il.com>
CC:	Zhang Rui <rui.zhang@...el.com>, Lina Iyer <lina.iyer@...aro.org>,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] thermal: qcom: tsens-8916: mark PM functions __maybe_unused


On 07/04/2016 06:42 PM, Arnd Bergmann wrote:
> The newly added tsens-8916 driver produces warnings when CONFIG_PM
> is disabled:
> 
> drivers/thermal/qcom/tsens.c:53:12: error: 'tsens_resume' defined but not used [-Werror=unused-function]
>  static int tsens_resume(struct device *dev)
>             ^~~~~~~~~~~~
> drivers/thermal/qcom/tsens.c:43:12: error: 'tsens_suspend' defined but not used [-Werror=unused-function]
>  static int tsens_suspend(struct device *dev)
>             ^~~~~~~~~~~~~
> 
> This marks both functions __maybe_unused to let the compiler
> know that they might be used in other configurations, without
> adding ugly #ifdef logic.

Thanks Arnd,
Reviewed-by: Rajendra Nayak <rnayak@...eaurora.org>

> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  drivers/thermal/qcom/tsens.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
> index 446f70b5dbb2..e4fca3350d26 100644
> --- a/drivers/thermal/qcom/tsens.c
> +++ b/drivers/thermal/qcom/tsens.c
> @@ -40,7 +40,7 @@ static int tsens_get_trend(void *p, int trip, enum thermal_trend *trend)
>  	return -ENOTSUPP;
>  }
>  
> -static int tsens_suspend(struct device *dev)
> +static int  __maybe_unused tsens_suspend(struct device *dev)
>  {
>  	struct tsens_device *tmdev = dev_get_drvdata(dev);
>  
> @@ -50,7 +50,7 @@ static int tsens_suspend(struct device *dev)
>  	return 0;
>  }
>  
> -static int tsens_resume(struct device *dev)
> +static int __maybe_unused  tsens_resume(struct device *dev)
>  {
>  	struct tsens_device *tmdev = dev_get_drvdata(dev);
>  
> 

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